Use the Exception Printer also for Printouts of Call Stacks (w/o exceptions).

[axgkl]

Hi, python's traceback offers

• walk_tb (which rich's Traceback uses to zap through the callstack at exception time) - but also
• walk_stack, where one can iterate over sys._getframe().f_back.f_back, i.e. over a frame.

It would be imho nice, if one could pass that walker generator function as an optional argument - then we could also print normal call stacks - i.e. outside of exceptions.

Right now one has to monkey patch rich to get to sth like that:

Done via a hack like this:

import traceback as tb


def my_frames_walker(tb_or_frame):
    # return python's walk_tb for rich, except when we are passed a frame
    if hasattr(tb_or_frame, 'f_back'):
          return reversed(tb.walk_stack(tb_or_frame))
    else:
          return tb.walk_tb(tb_or_frame)
          
rich.traceback.walk_tb = my_frames_walker
(...)

and use like this

    class StackTrace(Exception):
        pass

    def print_frames(frame):
        # fake an exception to make rich happy:
        si = [StackTrace, StackTrace(''), frame]
        console.print(Traceback.from_exception(*si, show_locals=True))
 

Alternative, provide a print_frames, accepting an iterable over frames, where one could also filter (?)